zimmer



"P, H. ZIMMER.

CONTROLLING DEVICE. APPucATloN FILED 'ma'. 4, 191

1,304,008. Patend May 20, 1919.

lUETTED sTATEs PATENT oEEIcE.

PAUL H. ZIMMER, OF MILWAUKEE, WISCONSIN, ASSIGNOR T0 THE CUTLERfHAMMERMFG. CO., OF MILWAUKEE, WISCONSIN, A CORPORATION OF WISCONSIN.

CONTROLLING DEVICE.

Specification of Letters Patent.

Patented May 20, 1919.

To all who/n it may concern:

Be it known that I, PAUL- H. ZIMMER, a citizen of the United States,residing at Milwaukee, in the county of Milwaukee and State ofWisconsin, have invented new and useful Improvements in ControllingDevices. of which the following is a full, clear, concise, and exactdescription, referencebeing had to the accompanying drawing, forming apart of this specification.

This invention relates to motor controllers and more particularly tosuch devices as control a plurality of circuits.

One of the objects of thel invention is to provide such devices withimproved means for effecting sequential opera-tion of the circuitcontrolling parts thereof.

Another object is to provide an improved controller wherein the partsthereof are ybiased to circuit closing position subject to movementtherefrom in a definite sequence.

A further object is to provide an improved controller wherein thecurrent controlling parts may be adjusted to operate 1n different ordersand atdifferent intervals.

Other objects and advantages of the invention will appear hereinafter inconnection with the description of the accompanying drawing whichillustrates a typical embodiment of the invention particularly adaptedfor controlling the field strength of a motor. It is to be understood,however, that the invention is susceptible of additional embodimentswithin the scope of the claims appended hereto and that the device maybe employed for various other purses.

In the drawing,

Figure 1 is a plan view of the controlling device, and

Fig. 2 is a side view thereof partially in Section.

The controller is mounted vertically upon an insulating panel l andincludes a. plurality of switch members or contact elements 2, 3, 4: and5 and an operating solenoid 6 therefor. The parts mentioned are carriedby a supporting frame 7 attached to the panel 1. Stationary contacts 8are also mounted on the panel 1 for coperation with the switch members,as will appear. The switch members 2 to 5 as shown comprise stampedmetal arms and the same are pivotally mounted at their lower ends upon ahub 9 which is revolubly carried by a shaft 10 supported betweenbifurcated extensions 1l of the frame 7. Spaced studs. 12 are arrangedon the hub 9 and the switch members are provided with apertures at theirlower ends to receive said studs, whereby the switch members are movablewit-l1 the hub but are also permitted a limited pivotal or rockingmovement relative thereto for a purpose hereinafter set forth. The hub 9is also, provided with integral spaced radial lugs 13, 1-1, 15 and 16arranged at different angles relatively to the hub and located directlyin the rear of the respective switch members. The latter are releasablyheld in the open bearings provided therefor on the hub and are biased tobear against the radial lugs 13 to 16 by coil springs 17 mounted in therear of a frame cross piece 18 on pins 19. Said pins are fixed to theswitchv arms at their forward ends and project through the cross piece18 and the respective lugs, the springs 17 being confined betweenwashers 2O on the pins and tending to retract the latter.

Centrally of the hub 9 and preferably below the same there is extendingcrank lever 21 having at its extremity a weight. 22. The operatingsolenoid 6 is supported in the frame 7 beneath `the switch members andthe solenoid core 23 1s operatively connected with the crank lever 21 bya link 24. A dash pot 25 or other means is provided to regulate thespeed of movement of the solenoid plunger.

Referring to Fig. 2, wherein all the switches are shown closed,energiiation of the solenoid 6 effects counter-clockwise rotation of thehub 9 and opening of the switch members 2, 3, 1 and 5 successively bythe offset lugs 13, 14, 15 and 16 respectively. Moreover, the springs 17take up the pivotal play of each of the switch members prior to theirabutment by the lugs 13 to 16 so that each switch is held closed duringa certain amount of rotation of the hub 9. Thus the active face of eachswitch member is dragged slightly against its coperating contact and theengaging surfaces of the same remain bright. Furthermore, the springs17, after opening of the switch members, continue. to bias the sameagainst their respective lu s and thus to bias both the switch nlenrb rsand the hub in a clockwise provided a rearwardly direction in oppositionto the solenoid. Accordingly upon denergization of the latter, thesprings coperate with the weight 22 to edect closure of all the switchessuccessively, but in an order inverse to the sequence of opening. Againdue to the limited pivotal play of the switch members after the sameabut the stationary contacts and are thereby arrested in their rotativemovement,(a wiping action isl also effected in closing in a mannersimilar to that above described. It will be observed, however, that thefinal rotative movement of the hub 8, after closure of the switch member1 and thus after cessation of the action of all -the springs 17 on thehub, is effected by the lever weight 22 alone.

The switch members 2, 3, 4: and 5 are also provided with adjustable pins26 projecting therethrough and affording stops on the inner sidesthereof for the lugs 13 'to 16. Said pins are releasably held againstadjustment by looped spring washers 27 but are capable of adjustmentrelative to the lugs 13 to 16 to vary the distances therefrom so thatthe" intervals between the critical operations of the switch members maybe varied at will and furthermore, the sequence of operation of ltheswitchesmay be varied so that the same open orclose circuit in anydesired progression or in groups.

I claim- 1. In combination, a stationary Contact, a coperating contactelement, a pivoted supporting member for said element, the latter alsohaving a bearing upon the former permitting relative movement thereof,and means constantly biasing said element, to-

. gether with its said supporting member, for

engagementdof said element with said stationary contact subject todisengagement by operation of said supporting member against the actionof said biasing means.

Q. In combination, a stationary contact, a coperating contact element, apivoted supporting member for said element, the latter also having abearing upon the former permitting relative movement thereof, and

means constantly biasing said element, together with its said supportingmember, for engagement of said element with said stationary contactsubject to disengagement by operation of said supporting member againstthe action of said biasing means, said supporting member also havingindependent biasing means to continue its aforesaid biased movementafter engagement of said element and .contact for the purpose set forth.

3. vIn combination, a stationary contact, a coperating contact element,a pivoted supporting member for said element, the latter also having abearing upon the former permitting relative movement thereof, meansconstantly biasing said element, together with its supporting member, ina direction to effect engagement of said element with said stationarycontact, said supporting member' also having independent biasing meansto continue its aforesaid biased movement after engagement of saidelement and Contact to effect a sliding movement of the former relativeto the latter, and electromagnetic means for operating said supportingmember in reverse direction to positively move said element out ofengagement with said stationary contact.

i. In combination, a relatively stationary contact, a coperating contactelement, an oscillatable supporting member for said element, the latterhaving an open bearing on the former permitting it to rock thereon. afixed member and a resilient connection between said contact element andsaid fixed member to hold said element in its bearing on saidsupportingmember and to normally hold said element in a given relation with saidstationary Contact subject to operation by said supporting member.

5. In combination` a relatively stationary contact, a coperatingcontactI element, an

oscillatable supporting member for said element, the latter'having anopen bearing on the former permitting it to rock thereon, a fixed memberand a resilient connection between said contact element'and said fixedmember to hold the former in its bearing on said supporting member andto bias said element `to a position of engagement with said stationary'contact subject to disengagement therefrom by actuation of saidsupporting member. y l

6. In combination, a stationary contact, a coperating contact element,an oscillatable member for supporting said element, said element havingan Aopen bearing on said member permitting 'it to rock thereon and saidmember having a part to engage said element at a distance from saidbearing, a fixed member and a resilient connection between said' fixedmember and said contact finger, said connection acting on said fingerintermediate of its bearing and said engaging part of said supportingmember.

7. In combination, an oscillatable member, a plurality of contactelements carried thereby, each of said elements having a lbearing onsaid member permitting it to rock thereon and said member having stopstov be respectively engaged by said elements, and independent tensiondevices for said elements for engagement with the said elements,coopera-tingr stationary contacts for said elements and independenttension devices for said eiements to normally hold the same inengagement with their respective contacts subject to disengagementtherefrom sequentially by said lugs when said member is moved in onedirection, said member providing ifor compound return movement of saidelements under the iniiuence of their tension devices to first butt andthen Wipe their respective contacts.

ln combination, a plurality of stationary contacts, coperating contactelements therefor, a common oscillatable supporting member for saidelements, each of said elements having a pivotal connectionwvith saidmember and said member having a plurality of lugs arranged thereon indilierent angular positions for engagement with said elements,independent tension devices for said elements yieldingly holding thesame in engagement with said contacts subject to disengagement therefromprogressively by the lugs on said member when the latter is operated ina given direction and a solenoid for operating said member in suchdirection.

10. In combination, a plurality of stationary contacts, a plurality ofcooperating contact elements, an osciilatable member, supporting saidelements, each of said elements having a bearing on said memberpermitting movement of one relative to the other and said member havinga plurality of lugs arranged thereon at dili'erent angles and serving asstops for said elements and adjustableV coperating stops on saidelements.

11. In combination, a plurality of stationary contacts, a plurality ofcoperating elements, an oscillatabie member, support-ing said elements,each of said elements have a bearing on said member permitting movementof one relative to the other and said member having a plurality of lugsarranged thereon at different angles and serving as stops for saidelements, adjustable coperating stops on said elements and independenttension devices for said elements, each biasing its respective elementtoward lthe stop lug provided therefor von said member.

In Witness whereof, l have hereunto subscribed my name in the presenceof two witnesses.

PAUL H. ZIMMER.

Witnesses L. A. WATSON, TEKLA BOsT.

